How can the use of noble gases be an advantage? Give an example.

The use of noble gases can be an advantage because:  The elements of Group VIII of the Periodic Table are gases which have closed shells and are unreactive chemically. ... Noble gases are used to advantage in environments where corrosion or damage from electrical discharges might occur if the environments were filled with air. One such use is in fluorescent light tubes...

Explanation:

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answer: the rock sample is a sedimentary rock.

explanation:

it is given that:

mass of rock sample, m = 2.7 g

volume of rock sample,

so, density of rock sample will be

since, the density of rock sample is . hence, the rock sample is a sedimentary rock, whose densities varies between .